CN101791890A - Fruit and vegetable anti-bacterial refreshing permeable film and manufacturing method thereof - Google Patents
Fruit and vegetable anti-bacterial refreshing permeable film and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to a fruit and vegetable anti-bacterial refreshing permeable film, comprising an upper layer, a middle layer and a lower layer, the upper layer is an anti-bacterial agent layer, the middle layer is a core layer, the lower layer is a gas adsorption layer, the middle layer is covered on the lower layer, the upper layer is covered on the middle layer, and the mass percents of the anti-bacterial agent layer, the core layer and the gas adsorption layer in the mass total sum are as follows: 15-20 percent of the anti-bacterial agent layer, 60-70 percent of the core layer and 15-20 percent of the gas adsorption layer; the invention further provides a manufacturing method of the fruit and vegetable anti-bacterial refreshing permeable film; the invention provides the fruit and vegetable anti-bacterial refreshing permeable film which can enhance the refreshing effect and effectively prolong the refreshing time and the manufacturing method thereof.
Description
Technical field
The present invention relates to a kind of fruit-vegetable plastic wrap and manufacture method thereof.
Background technology
China is the first fruits and vegetables big country in the world, and the fruits and vegetables of production and selling except major part supply domestic market, still have section port to other countries.Because it is fresh-keeping that China's fruits and vegetables are continued to use traditional preservative film always, in storage, transportation and the sales process of fruits and vegetables, reach more than 30% because of packing the rotten loss of the improper fruits and vegetables that cause, this loss ratio is huge.
Existing common preservative film carries out preserving fruit and vegetable utilizing, because fresh fruit of vegetables is a live body, after plucking or gathering in the crops, still breathing, vigorous life is arranged, and the nutrition and the moisture content that need to consume self earn a bare living; After gathering as fruit and vegetable, untimely Preservation Treatment, 3～5 days at least (for example general leaf vegetables fruits and vegetables, strawberry, lichee, longan and cherry or the like), at most about 10 days (for example tubers fruits and vegetables, peach, plum and grape or the like), it is withered dehydration to occur, quality worsens and rots, and loses edibility; Although different fruits and vegetables attributes is inequality, variable color, dehydration is spoiled and to rot be the common problem that exists; Therefore, how to find a kind of fruit-vegetable plastic wrap, the metabolic process that can suppress fruits and vegetables, reduce the consumption of the nutriment of fruits and vegetables, the good taste and the high-quality that keep fruits and vegetables, make the shelf-life of fruits and vegetables not go mouldy more than two months and rot at the shelf-life of prolongation fruits and vegetables, making fruits and vegetables still keep taste and quality preferably, is a technical barrier that needs to be resolved hurrily.
Summary of the invention
The deficiency poor for the fresh-keeping effect that overcomes existing vegetable and fruit packaging film and manufacturing process thereof, that fresh keeping time is short the invention provides and a kind ofly strengthens fresh-keeping effect, effectively prolongs the fruits and vegetables anti-bacterial refreshing permeable film and the manufacture method thereof of fresh keeping time.
The technical solution used in the present invention is:
A kind of fruits and vegetables anti-bacterial refreshing permeable film, comprise upper strata, intermediate layer and lower floor, described upper strata is the antiseptic layer, described intermediate layer is a sandwich layer, described lower floor is a gas-absorbing layer, described intermediate layer covers in the described lower floor, and described upper strata covers on the described intermediate layer, and the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15～20%; Sandwich layer: 60～70%; Gas-absorbing layer: 15～20%.
Described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, and the ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant; 0.1～0.3 part of antiseptic;
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44～52 parts of metallocene PEs; 8～16 parts of LLDPEs; 28～47 parts of calcium carbonate activated masterbatch; 0.8～2.4 part of stabilizing agent; 0.2～0.6 part in antioxidant;
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; , 1～5 part of organosilicon micro mist; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant.
Further again, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 18%; Sandwich layer: 64%; Gas-absorbing layer: 18%;
A kind of manufacture method of fruits and vegetables anti-bacterial refreshing permeable film adopts the hydrostomia pulling method to produce, and described preparation method may further comprise the steps:
(1), raw material metering: the mass percent that antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15～20%; Sandwich layer: 60～70%; Gas-absorbing layer: 15～20%;
Described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, and the ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant; 0.1～0.3 part of antiseptic;
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44～52 parts of metallocene PEs; 8～16 parts of LLDPEs; 28～47 parts of calcium carbonate activated masterbatch; 0.8～2.4 part of stabilizing agent; 0.2～0.6 part in antioxidant;
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; , 1～5 part of organosilicon micro mist; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant.
(2), extrude: respectively by three extruders processing antiseptic layer, sandwich layer and gas-absorbing layer, the melt of three layer laminate, by adjustable die lip, melt drenches film and flows out in the form of sheets, casts sheet film base from the melt that the extruder die head hydrostomia comes out;
(3), Quench: will drench the film melt and send into the Quench pipe, the cooling moulding;
(4) side cut and sided corona treatment: the film that processes is cut the edge, both sides, and carry out sided corona treatment;
(5), traction: with the heating of sheet film base, carry out the multiple spot longitudinal stretching, make film produce the micron hole, make the vertical marshalling of polymer molecule in the film simultaneously;
(6), rolling: under traction, carry out rolling, become the product of different in width according to customer requirements respectively; Make the fruits and vegetables anti-bacterial refreshing permeable film.
Further, in described step (5), the film after the traction carries out thickness measuring, and thickness data is fed back to automatic controls, adjusts the opening amount of extruder die head in real time.
Further again, in described step (5), the film behind the thickness measuring carries out embossing, printed decoration is handled.
Beneficial effect of the present invention is mainly reflected in: (1), the present invention have solved long fresh-keeping problem behind the fruit and vegetable picking effectively, and freshness date reached more than two months, and fruits and vegetables are can dehydration withered in the freshness date, and quality worsens, and rot and lose edibility.The preserving fruit and vegetable utilizing mode is various, can use blister-pack, also can make packaging bag with film, and method is simple, effect is remarkable; (2), solve insect-pest and the anti-birds of fruits and vegetables in growth course effectively and held the problem of chiseling in the month, the orchard worker all adopts the method for paper bag suit fruit to handle at present, and paper bag is unable to undergo to expose to the sun and rain usually, easily broken bag, secondly the paper bag aeration is poor, grow mould easily in the bag, and the fruit bag that film of the present invention is made is promptly ventilative, be not made of salt again, rainwater can not leak in the bag, and mould and microorganism all are blocked on outside the bag, has realized ecological growth; (3), the invention solves fruit in the deinsectization spray medicine phase, soup spatters fruit, the problem of pollution fruit, use film of the present invention to make the achievement bag, be enclosed within on the fruit, spatter during the spray medicine on the fruit bag, medicine company can not be penetrated in the bag, thereby does not have the problem of polluting fruit, guarantees the environmental protection of fruit.
Figure of description
Fig. 1 is a fruits and vegetables anti-bacterial refreshing permeable film structural representation.
Fig. 2 is the manufacturing approach craft flow chart of fruits and vegetables anti-bacterial refreshing permeable film.
The specific embodiment
The present invention is described further below in conjunction with specific embodiment, but protection scope of the present invention is not limited in this:
With reference to Fig. 1, a kind of fruits and vegetables anti-bacterial refreshing permeable film, comprise upper strata 1, intermediate layer 2 and lower floor 3, described upper strata 1 is the antiseptic layer, described intermediate layer 2 is a sandwich layer, and described lower floor 3 is a gas-absorbing layer, and described intermediate layer 2 covers in the described lower floor 3, described upper strata 1 covers on the described intermediate layer 2, and the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15～20%; Sandwich layer: 60～70%; Gas-absorbing layer: 15～20%;
Described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, and the ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant; 0.1～0.3 part of antiseptic;
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44～52 parts of metallocene PEs; 8～16 parts of LLDPEs; 28～47 parts of calcium carbonate activated masterbatch; 0.8～2.4 part of stabilizing agent; 0.2～0.6 part in antioxidant;
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; , 1～5 part of organosilicon micro mist; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant.
In the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15%; Sandwich layer: 65%; Gas-absorbing layer: 20%.
Described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, the ratio of quality and the number of copies of various components is: 24 parts of metallocene PEs (mLLDPE), adopt american exxon chemical company to produce the trade mark 3527; 6 parts of LLDPEs (LLDPE) adopt american exxon chemical company to produce the trade mark 3523; 7 parts of calcium carbonate activated masterbatch adopt Taiwan letter to pardon international heavy chemicals company product, trade mark ultra micron calcium carbonate master batch; 0.1 part of stabilizing agent adopts Milan, Nanjing chemical industry Co., Ltd to produce, and the trade mark is 944; 0.1 part in antioxidant adopts Guangzhou national power chemical industry Co., Ltd to produce, and the trade mark is 1010; 0.1 part of antiseptic (LDPE-ZSFZ) adopts Shanghai to tie up new material Co., Ltd to produce, and the trade mark is LDPE.
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44 parts of metallocene PEs, adopt american exxon chemical company to produce the trade mark 3527; 8 parts of LLDPEs adopt american exxon chemical company to produce the trade mark 3523; 28 parts of calcium carbonate activated masterbatch adopt Taiwan letter to pardon international heavy chemicals company product, trade mark ultra micron calcium carbonate master batch; 0.8 part of stabilizing agent adopts Milan, Nanjing chemical industry Co., Ltd to produce, and the trade mark is 944; 0.2 part in antioxidant adopts Guangzhou national power chemical industry Co., Ltd to produce, and the trade mark is 1010.
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24 parts of metallocene PEs, adopt american exxon chemical company to produce the trade mark 3527; 6 parts of LLDPEs adopt american exxon chemical company to produce the trade mark 3523; 7 parts of calcium carbonate activated masterbatch adopt Taiwan letter to pardon international heavy chemicals company product, trade mark ultra micron calcium carbonate master batch; 1 part of organosilicon micro mist adopts the auspicious chemical industry Co., Ltd of speeding in Shanghai to produce, and the trade mark is RM4-7081; 0.1 part of stabilizing agent adopts Milan, Nanjing chemical industry Co., Ltd to produce, and the trade mark is 944; 0.3 part in antioxidant adopts Guangzhou national power chemical industry Co., Ltd to produce, and the trade mark is 1010.
The fruits and vegetables anti-bacterial refreshing breathable films of present embodiment adopts the hydrostomia stretching technique, adopt special extrusion equipment, hydrostomia becomes the base film, stretch through special equipment again, make the base film in drawing process, become film on the one hand, on the other hand, because the effect of tensile force, combining between filler and the film is damaged, thereby forms micropore, the size of this micropore depends on the size and the draw ratio of filler-calcium carbonate particle, the present invention adopts the filler of nano-grade size, make pore size be in 1～3 micron, the micropore in the film changes the iris action of common plastic film to gas on the one hand, become the film that to breathe freely, on the other hand, because this pore size is small, can not the permeate water molecule, therefore, film has the characteristics of permeable watertight.
The principle of fruits and vegetables anti-bacterial refreshing breathable films of the present invention is on the basis of the rule in the growth period that fully understands fruits and vegetables, explores the principal element of fruit vegetables storing period, behind fruit and vegetable picking, still by consuming the mechanism that idiotrophic and moisture earn a bare living; Although different fruits and vegetables, physiological attribute is inequality, the fruits and vegetables variable color, and dehydration is spoiled and rotten and lose edibility, and this common problem is furtherd investigate, and the present invention mainly carries out according to following design:
(1), the air of maintenance appropriateness passes through the moisture content of maintenance appropriateness:
Keeping suitable oxygen and gas concentration lwevel, is the key that keeps preserving fruit and vegetable utilizing.According to experiment, the oxygen concentration too low (≤8% situation) in the bag film is easy to generate ethanol, acetaldehyde volatile matter, and fruits and vegetables are easy to generate peculiar smell, and then rotten.Concentration of carbon dioxide too high (〉=10% situation) also can damage fruits and vegetables; Fruits and vegetables anti-bacterial refreshing permeable film of the present invention, through experiment, the micropore of ventilated membrane can see through oxygen for 1～3 micron, and the release of the carbon dioxide of fruits and vegetables live body, can adapt to the specification requirement of fruits and vegetables gas preservation fully.
(2), add the ethylene gas absorbent
Fruit is in the process of maturation, can slowly discharge ethylene gas, become the hormone hormone of plant production, ethene gathers in freshness protection package, can quicken the aging of fruit, shortened storage period, therefore, in the thin film fabrication process, add the organosilicon micro mist, effect with ethylene adsorption gas, the ethylene gas that fruit is discharged has adsorbed; If ethylene gas is more, certainly, also can pass through above-mentioned two processing so partly by the volatilization of ventilated membrane micropore, the breathing that just can slow down fruit prolongs fruit declining period, has effectively prolonged the storage period of fruit.
(3), fruit in process of production, for ensureing that fruit is not subjected to the invasion and attack of insect pest and pecking at of birds, usually can adopt on the fruit of fruit tree in the orchard and put paper bag, but, because of the gas permeability of paper bag poor, add paper bag and can't forbid wind and weather, fruit maturation needless to say often, the paper cover is thoroughly fragmentation;
Worm spray medicine is all controlled to fruit tree in each orchard, and soup spatters paper bag easily with water, and then pollutes fruit, becomes the maximum hard defects of environmental protection; And if adopt ventilated membrane of the present invention, be enclosed within the bag film on the fruit, not only ventilative but also waterproof, on rainy day, rainwater drenches and does not advance bag film, during the spray medicine, soup does not advance in the bag film thoroughly.Wind and weather all is not easy to cause broken bag, and insect pest is walked to be advanced, and birds can not peck at, and can not grow various harmful bacterias in the bag, can effectively guarantee the eco-environmental prote of fruit.
Fruits and vegetables anti-bacterial refreshing permeable film of the present invention, primary raw material is metallocene PE (mLLDEP), LLDPE (LLDEP), wherein metallocene PE accounts for major part, with respect to LLDPE, the price of metallocene PE is higher, because of the performance of LLDPE undesirable: processing drawing process in, cause rupture of membranes easily, and the hot strength of film and Air permenbility are all undesirable, in the strand of LLDEP, there is not long side chain, short side chain is more, and relative molecular mass is narrow, simultaneously, fusing point is higher relatively, the viscosity of melt and continuity are all relatively poor, therefore, and unstable properties, cause rupture of membranes easily, hot strength and gas permeability are all undesirable; This is because the density of LLDEP determines with relative molecular weight.Because side chain length and quantity on the main chain of the density of the kind of comonomer decision LLDEP, the content of comonomer is many more, and side chain is just many more, and a chain length also becomes long more.
And containing more long-chain branch among the mLLDEP, mLLDEP has compared better toughness, transparency and cleannes with LLDEP, therefore, in process of production, high shear force is more stable than LLDEP, is difficult for melt fracture takes place, and product surface was both smooth and flatness is better; Have higher process velocity and processing stability than LLDEP, melt tension is than LLDEP height, and the stretching uniformity is better, can be at the wider processing temperature compacted under; The viscosity of mLLDEP is lower, good fluidity, and heat-sealing is than low 26 ℃ of LLDEP, so the mouldability of product is more suitable for the needs of vegetable and fruit packaging film.
In order to make the fruits and vegetables antimicrobial preservative film reach the product kilter, primary raw material adopts mLLDEP; But, because the producer price of mLLDEP is higher,,, mix suitable LLDEP in the raw material total amount through repetition test for the price that reduces product reduces user's spending, reduced cost, the performance of product still adheres to specification.
Table 1 is that the performance of mLLDEP and LLDEP compares schematic diagram:
| Project name | Required value | ??mLLDEP | ??LLDEP |
| Air permeability g/m.24h | ??≥2500 | ??＞5600 | ??3000～4600 |
| Sided corona treatment DYN | ??≥40 | ??＞40 | ??38～40 |
| MD tensile strength Mpa | ??＞5 | ??≥7.6 | ??4.6～5.4 |
| TD tensile strength Mpa | ??＞1.7 | ??≥2 | ??1.8～1.9 |
| MD extension at break % | ??≥150 | ??＞180 | ??130～160 |
| TD extension at break % | ??≥300 | ??＞400 | ??280～320 |
Table 1
The anti-bacterial refreshing permeable film of present embodiment, the antibacterial plastic concentrate that adds is LDPE-ZSFZ, this masterbatch adopts the group of molecules packing technique, adopt chemical method, on the poly strand of basic resin, assembling is through preferably having the antibacterial plastic concentrate of efficient spectrum activity, this antibacterial plastic concentrate is to the human body safety non-toxic, hear resistance is strong, it is the polymeric material of a kind of polyamine and amine salt, be a kind of the have good disinfecting, antimicrobial and polymer of fungicidal properties, use as antiseptic that this antibacterial plastic concentrate has following distinguishing feature in developed country:
(1) efficient spectrum antibiotic property, detect through domestic authoritative institution, the common bacterium of daily life environment, fungi and mould all there is excellent fungistatic effect, can prevent effectively that fruits and vegetables from the corrosional fruits and vegetables stain of common bacterium colony occurring, rot in freshness date, the generation of situations such as stick-slip and mashed core, prolonged freshness date; Antibacterial effect is: Escherichia coli, staphylococcus aureus, Pseudomonas aeruginosa, hay bacillus, Diplococcus pneumopniae etc., and bacteriostasis rate reaches 99.99%; Saccharomyces sake, black-koji mould, Rigen mould, Aspergillus flavus, white are read coccus, and the mildew-resistant grade reaches 0～1 rank, detect through Shanghai City health and epidemic prevention station, belong to nontoxic non-stimulated material, reach the food-grade safety and sanitation standard.
The basic mechanical design feature index of fruits and vegetables anti-bacterial refreshing permeable film, as shown in table 2 below:
Table 2
(2), antibacterial effect is lasting, there is one day in film, antibacterial effect can not fail, and can not run off, the life-span reached more than 3 years, washing is soaked and is not influenced that it is long-acting; Have advantages of excellent stability, can anti-380 ℃ of high temperature, chemical property is stable; Have excellent processing characteristics, improve the surface property of goods, in the processing, the antibacterial functions group that polarity is stronger is distributed in the surface easily, improve the effective rate of utilization of antibacterial functions group, improve the hydrophily of the polarity on surface on the other hand, thereby change the anti-static function of goods.
With reference to Fig. 1, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 16%; Sandwich layer: 66%; Gas-absorbing layer: 18%.
In the described antiseptic layer, the ratio of quality and the number of copies of planting component is: 25 parts of metallocene PEs; 7 parts of LLDPEs; 8 parts of calcium carbonate activated masterbatch; 0.2 part of stabilizing agent; 0.15 part in antioxidant; 0.2 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of planting component is: 45 parts of metallocene PEs; 10 parts of LLDPEs; 30 parts of calcium carbonate activated masterbatch; 1.0 parts of stabilizing agents; 0.3 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 25 parts of metallocene PEs; 8 parts of LLDPEs; 8 parts of calcium carbonate activated masterbatch; , 2 parts of organosilicon micro mists; 0.2 part of stabilizing agent; 0.2 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 1.
With reference to Fig. 1, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15%; Sandwich layer: 70%; Gas-absorbing layer: 15%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 26 parts of metallocene PEs; 8 parts of LLDPEs; 10 parts of calcium carbonate activated masterbatch; 0.22 part of stabilizing agent; 0.21 part in antioxidant; 0.25 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 48 parts of metallocene PEs; 11 parts of LLDPEs; 32 parts of calcium carbonate activated masterbatch; 1.5 parts of stabilizing agents; 0.4 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 25 parts of metallocene PEs; 8 parts of LLDPEs; 11 parts of calcium carbonate activated masterbatch; , 3.5 parts of organosilicon micro mists; 0.24 part of stabilizing agent; 0.28 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 1.
Embodiment 4
With reference to Fig. 1, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 18%; Sandwich layer: 64%; Gas-absorbing layer: 18%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 28 parts of metallocene PEs; 9 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; 0.3 part of stabilizing agent; 0.2 part in antioxidant; 0.25 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 50 parts of metallocene PEs; 14 parts of LLDPEs; 42 parts of calcium carbonate activated masterbatch; 2.1 parts of stabilizing agents; 0.4 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 27.5 parts of metallocene PEs; 8.5 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; 4 parts of organosilicon micro mists; 0.2 part of stabilizing agent; 0.2 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 1.
Embodiment 5
With reference to Fig. 1, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 19%; Sandwich layer: 65%; Gas-absorbing layer: 16%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 29 parts of metallocene PEs; 9.5 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; 0.25 part of stabilizing agent; 0.3 part in antioxidant; 0.28 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 51 parts of metallocene PEs; 15 parts of LLDPEs; 46 parts of calcium carbonate activated masterbatch; 2.2 parts of stabilizing agents; 0.5 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 28 parts of metallocene PEs; 9 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; , 4 parts of organosilicon micro mists; 0.3 part of stabilizing agent; 0.28 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 1.
Embodiment 6
With reference to Fig. 1, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 20%; Sandwich layer: 60%; Gas-absorbing layer: 20%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 30 parts of metallocene PEs; 10 parts of LLDPEs; 3 parts of calcium carbonate activated masterbatch; 0.3 part of stabilizing agent; 0.3 part in antioxidant; 0.3 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 52 parts of metallocene PEs; 16 parts of LLDPEs; 47 parts of calcium carbonate activated masterbatch; 2.4 parts of stabilizing agents; 0.6 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 30 parts of metallocene PEs; 10 parts of LLDPEs; 13 parts of calcium carbonate activated masterbatch; , 5 parts of organosilicon micro mists; 0.3 part of stabilizing agent; 0.3 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 1.
Embodiment 7
See figures.1.and.2, a kind of manufacture method of fruits and vegetables anti-bacterial refreshing permeable film adopts the hydrostomia pulling method to produce, and described preparation method may further comprise the steps:
(1), raw material metering: the mass percent that antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15～20%; Sandwich layer: 60～70%; Gas-absorbing layer: 15～20%;
Described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, and the ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant; 0.1～0.3 part of antiseptic;
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44～52 parts of metallocene PEs; 8～16 parts of LLDPEs; 28～47 parts of calcium carbonate activated masterbatch; 0.8～2.4 part of stabilizing agent; 0.2～0.6 part in antioxidant;
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; , 1～5 part of organosilicon micro mist; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant.
(2), extrude: respectively by three extruders processing antiseptic layer, sandwich layer and gas-absorbing layer, the melt of three layer laminate, by adjustable die lip, melt drenches film and flows out in the form of sheets, casts sheet film base from the melt that the extruder die head hydrostomia comes out;
(3), Quench: will drench the film melt and send into the Quench pipe, the cooling moulding;
(4) side cut and sided corona treatment: the film that processes is cut the edge, both sides, and carry out sided corona treatment;
(5), traction: with the heating of sheet film base, carry out the multiple spot longitudinal stretching, make film produce the micron hole, make the vertical marshalling of polymer molecule in the film simultaneously;
(6), rolling: under traction, carry out rolling, become the product of different in width according to customer requirements respectively; Make the fruits and vegetables anti-bacterial refreshing permeable film.
In described step (5), the film after the traction carries out thickness measuring, and thickness data is fed back to automatic controls, adjusts the opening amount of extruder die head in real time.
In described step (5), the film behind the thickness measuring carries out embossing, printed decoration is handled.
In the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15%; Sandwich layer: 65%; Gas-absorbing layer: 20%.
Described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, the ratio of quality and the number of copies of various components is: 24 parts of metallocene PEs (mLLDPE), adopt american exxon chemical company to produce the trade mark 3527; 6 parts of LLDPEs (LLDPE) adopt american exxon chemical company to produce the trade mark 3523; 7 parts of calcium carbonate activated masterbatch adopt Taiwan letter to pardon international heavy chemicals company product, trade mark ultra micron calcium carbonate master batch; 0.1 part of stabilizing agent adopts Milan, Nanjing chemical industry Co., Ltd to produce, and the trade mark is 944; 0.1 part in antioxidant adopts Guangzhou national power chemical industry Co., Ltd to produce, and the trade mark is 1010; 0.1 part of antiseptic (LDPE-ZSFZ) adopts Shanghai to tie up new material Co., Ltd to produce, and the trade mark is LDPE.
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44 parts of metallocene PEs, adopt american exxon chemical company to produce the trade mark 3527; 8 parts of LLDPEs adopt american exxon chemical company to produce the trade mark 3523; 28 parts of calcium carbonate activated masterbatch adopt Taiwan letter to pardon international heavy chemicals company product, trade mark ultra micron calcium carbonate master batch; 0.8 part of stabilizing agent adopts Milan, Nanjing chemical industry Co., Ltd to produce, and the trade mark is 944; 0.2 part in antioxidant adopts Guangzhou national power chemical industry Co., Ltd to produce, and the trade mark is 1010.
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24 parts of metallocene PEs, adopt american exxon chemical company to produce the trade mark 3527; 6 parts of LLDPEs adopt american exxon chemical company to produce the trade mark 3523; 7 parts of calcium carbonate activated masterbatch adopt Taiwan letter to pardon international heavy chemicals company product, trade mark ultra micron calcium carbonate master batch; 1 part of organosilicon micro mist adopts the auspicious chemical industry Co., Ltd of speeding in Shanghai to produce, and the trade mark is RM
4-7081; 0.1 part of stabilizing agent adopts Milan, Nanjing chemical industry Co., Ltd to produce, and the trade mark is 944; 0.1～0.3 part in antioxidant adopts Guangzhou national power chemical industry Co., Ltd to produce, and the trade mark is 1010.
The fruit anti-bacterial refreshing permeable film of present embodiment adopts the hydrostomia stretching technique, adopts special extrusion equipment, hydrostomia becomes the base film, stretches through special equipment again, makes the base film in drawing process, become film on the one hand, on the other hand, because the effect of tensile force, combining between filler and the film is damaged, thereby formation micropore, the size of this micropore depends on filler-calcium carbonate masterbatch pellet size and draw ratio, and present embodiment adopts the filler of nano-scale, makes pore size be in 1～3 micron.Micropore in the film has on the one hand changed the iris action of common plastic film to gas, becomes the film that may breathe freely, on the other hand, because the size of this micropore is small, can not the permeate water molecule, therefore, film has the characteristic of permeable watertight.
The detailed process of described manufacture method is:
(1), raw material measurement process: raw material carries out drying earlier, remove moisture content, requirement according to prescription, correct metering raw material and various auxiliary material, according to the raw material and the auxiliary material of three different levels, accurately after the metering, put into the premix machine and handle stirring, wait to stir after conveyer feeding to three a different stub bar enters three different extruders;
(2), drench membrane process
2.1, extrude: send into the material of hopper through feeder, entering diameter is 125mm, and draw ratio is 32/1 extruder, carries out fusion plastification, and through automatic fitration, main extrude and auxilliary extruder melting charge carries out lamination automatically and extrudes enters T pattern head;
2.2, the three stacked melts of putting, by the die lip of automatic and adjustable, melt drenches film and flows out in the form of sheets, casts certain thickness sheet film base from the melt that die head flows out;
2.3, Quench
The sheet film base that pouring film melt is cast is sent into the Quench pipe, the cooling moulding; Sheet film to moulding is cut edge and sided corona treatment.
2.4, the traction thickness measuring
Treated sheet film under the situation of heating, carries out the multiple spot longitudinal stretching, makes film produce the micron hole, makes the vertical line of film high polymer molecule neat simultaneously, improves the mechanical performance of film;
Film is drawn thickness measuring, and the automatic measuring thickness instrument feeds back to automatic controls with data, adjusts the opening amount of T pattern head.
2.5, film is carried out embossing, printed decoration is handled, and increases attractive in appearance and identification.
(3), winding process
3.1, film the traction under carry out rolling;
3.2, the film after the rolling, according to user's requirement, cut into the product of different in width, exist in the storehouse more than 24 hours, eliminate stress; Through test package, weigh, outbound is put on market.
In the present embodiment, adopt to add the nano-calcium carbonate masterbatch in the polypropylene material, and, add other auxiliary material corresponding to each layer role; Extrude through special-purpose extruder, hydrostomia becomes the base film, stretches through special-purpose stretcher again, make the base film in drawing process, become film on the one hand, on the other hand, because the effect of tensile force makes the combination between filler and the film be subjected to destruction, form micropore, the size of this micropore depends on the size and the draw ratio of filler particles, because present embodiment has adopted the filler of nano-grade size, and the pore size of formation is between 1～3 micron, can breathe freely, but hydrone but can not see through.
Embodiment 8
See figures.1.and.2, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 16%; Sandwich layer: 66%; Gas-absorbing layer: 18%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 25 parts of metallocene PEs; 7 parts of LLDPEs; 8 parts of calcium carbonate activated masterbatch; 0.2 part of stabilizing agent; 0.15 part in antioxidant; 0.2 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 45 parts of metallocene PEs; 10 parts of LLDPEs; 30 parts of calcium carbonate activated masterbatch; 1.0 parts of stabilizing agents; 0.3 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 25 parts of metallocene PEs; 8 parts of LLDPEs; 8 parts of calcium carbonate activated masterbatch; , 2 parts of organosilicon micro mists; 0.2 part of stabilizing agent; 0.2 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 7.
Embodiment 9
See figures.1.and.2, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15%; Sandwich layer: 70%; Gas-absorbing layer: 15%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 26 parts of metallocene PEs; 8 parts of LLDPEs; 10 parts of calcium carbonate activated masterbatch; 0.22 part of stabilizing agent; 0.21 part in antioxidant; 0.25 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 48 parts of metallocene PEs; 11 parts of LLDPEs; 32 parts of calcium carbonate activated masterbatch; 1.5 parts of stabilizing agents; 0.4 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 25 parts of metallocene PEs; 8 parts of LLDPEs; 11 parts of calcium carbonate activated masterbatch; , 3.5 parts of organosilicon micro mists; 0.24 part of stabilizing agent; 0.28 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 7.
Embodiment 10
See figures.1.and.2, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 18%; Sandwich layer: 64%; Gas-absorbing layer: 18%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 28 parts of metallocene PEs; 9 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; 0.3 part of stabilizing agent; 0.2 part in antioxidant; 0.25 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 50 parts of metallocene PEs; 14 parts of LLDPEs; 42 parts of calcium carbonate activated masterbatch; 2.1 parts of stabilizing agents; 0.4 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 27.5 parts of metallocene PEs; 8.5 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; 4 parts of organosilicon micro mists; 0.2 part of stabilizing agent; 0.2 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 7.
Embodiment 11
See figures.1.and.2, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 19%; Sandwich layer: 65%; Gas-absorbing layer: 16%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 29 parts of metallocene PEs; 9.5 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; 0.25 part of stabilizing agent; 0.3 part in antioxidant; 0.28 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 51 parts of metallocene PEs; 15 parts of LLDPEs; 46 parts of calcium carbonate activated masterbatch; 2.2 parts of stabilizing agents; 0.5 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 28 parts of metallocene PEs; 9 parts of LLDPEs; 12 parts of calcium carbonate activated masterbatch; , 4 parts of organosilicon micro mists; 0.3 part of stabilizing agent; 0.28 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 7.
Embodiment 12
See figures.1.and.2, in the present embodiment, the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 20%; Sandwich layer: 60%; Gas-absorbing layer: 20%.
In the described antiseptic layer, the ratio of quality and the number of copies of various components is: 30 parts of metallocene PEs; 10 parts of LLDPEs; 3 parts of calcium carbonate activated masterbatch; 0.3 part of stabilizing agent; 0.3 part in antioxidant; 0.3 part of antiseptic;
In the described sandwich layer, the ratio of quality and the number of copies of various components is: 52 parts of metallocene PEs; 16 parts of LLDPEs; 47 parts of calcium carbonate activated masterbatch; 2.4 parts of stabilizing agents; 0.6 part in antioxidant;
In the described gas-absorbing layer, the ratio of quality and the number of copies of various components is: 30 parts of metallocene PEs; 10 parts of LLDPEs; 13 parts of calcium carbonate activated masterbatch; , 5 parts of organosilicon micro mists; 0.3 part of stabilizing agent; 0.3 part in antioxidant.
Other schemes of present embodiment are all identical with embodiment 7.
Claims (6)
1. fruits and vegetables anti-bacterial refreshing permeable film, comprise upper strata, intermediate layer and lower floor, it is characterized in that: described upper strata is the antiseptic layer, described intermediate layer is a sandwich layer, described lower floor is a gas-absorbing layer, described intermediate layer covers in the described lower floor, and described upper strata covers on the described intermediate layer, and the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15～20%; Sandwich layer: 60～70%; Gas-absorbing layer: 15～20%.
2. fruits and vegetables anti-bacterial refreshing permeable film as claimed in claim 1, it is characterized in that: described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, and the ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant; 0.1～0.3 part of antiseptic;
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44～52 parts of metallocene PEs; 8～16 parts of LLDPEs; 28～47 parts of calcium carbonate activated masterbatch; 0.8～2.4 part of stabilizing agent; 0.2～0.6 part in antioxidant;
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; , 1～5 part of organosilicon micro mist; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant.
3. fruits and vegetables anti-bacterial refreshing permeable film as claimed in claim 1 or 2 is characterized in that: the mass percent that described antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 18%; Sandwich layer: 64%; Gas-absorbing layer: 18%.
4. the manufacture method of a fruits and vegetables anti-bacterial refreshing permeable film as claimed in claim 1 is characterized in that: described manufacture method adopts the hydrostomia pulling method to produce, and described preparation method may further comprise the steps:
(1), raw material metering: the mass percent that antiseptic layer, sandwich layer and gas-absorbing layer account for the quality summation is: antiseptic layer: 15～20%; Sandwich layer: 60～70%; Gas-absorbing layer: 15～20%;
Described antiseptic layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent, antioxidant and antiseptic, and the ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant; 0.1～0.3 part of antiseptic;
Described sandwich layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 44～52 parts of metallocene PEs; 8～16 parts of LLDPEs; 28～47 parts of calcium carbonate activated masterbatch; 0.8～2.4 part of stabilizing agent; 0.2～0.6 part in antioxidant;
Described gas-absorbing layer comprises metallocene PE, LLDPE, calcium carbonate activated masterbatch, organosilicon micro mist, stabilizing agent and antioxidant; The ratio of quality and the number of copies of various components is: 24～30 parts of metallocene PEs; 6～10 parts of LLDPEs; 7～13 parts of calcium carbonate activated masterbatch; , 1～5 part of organosilicon micro mist; 0.1～0.3 part of stabilizing agent; 0.1～0.3 part in antioxidant.
(2), extrude: respectively by three extruders processing antiseptic layer, sandwich layer and gas-absorbing layer, the melt of three layer laminate, by adjustable die lip, melt drenches film and flows out in the form of sheets, casts sheet film base from the melt that the extruder die head hydrostomia comes out;
(3), Quench: will drench the film melt and send into the Quench pipe, the cooling moulding;
(4) side cut and sided corona treatment: the film that processes is cut the edge, both sides, and carry out sided corona treatment;
(5), traction: with the heating of sheet film base, carry out the multiple spot longitudinal stretching, make film produce nano-pore, make the vertical marshalling of polymer molecule in the film simultaneously;
(6), rolling: under traction, carry out rolling, become the product of different in width according to customer requirements respectively; Make the fruits and vegetables anti-bacterial refreshing permeable film.
5. manufacture method as claimed in claim 4 is characterized in that: in described step (5), the film after the traction carries out thickness measuring, and thickness data is fed back to automatic controls, adjusts the opening amount of extruder die head in real time.
6. manufacture method as claimed in claim 5 is characterized in that: in described step (5), the film behind the thickness measuring carries out embossing, printed decoration is handled.
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| CN101955606A (en) * | 2010-10-11 | 2011-01-26 | 中华全国供销合作总社济南果品研究院 | Preservative film special for red Fuji apples |
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